Structure 69060 · St. Louis County, MN

US 169 over Csah 102

Carries US 169 over Csah 102, 2.6 Mi W Of Jct TH 53.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT231 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 5/9

231 ft end to end, longest span 95 ft: about 3 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built197056 years old
Length231.0 ft70.4 m
Daily traffic4,850counted 2019
Last inspectedOctober 2023every 24 months

Location

StateMinnesota
CountySt. Louis
Location2.6 Mi W Of Jct TH 53
CarriesUS 169
CrossesCsah 102
Coordinates47.51836, -92.61508

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length231.0 ft (70.4 m)
Max Span95.5 ft (29.1 m)
Deck Width44.3 ft (13.5 m)
Deck Area950.4 sq m
Main Spans3
Year Built1970

Traffic

Avg Daily Traffic4,850 (2019)
Truck Traffic4%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number69060

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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